多肽链主链骨架的组成是 A -NCCNNCCNNCCN- B - CANOCHNOCHNO -C

多肽链主链骨架的组成是

A -NCCNNCCNNCCN-

B - CANOCHNOCHNO -

C -CONHCONHCONH -

D -CNOHCNOHCNOH -

E -CHNOCNHOCNHO -